protected BaseLookupFacade(LookupDispatcher lookupDispatcher, LookupRateLimiter lookupRateLimiter, ExceptionFactory exceptionFactory, TimeSpan timeout)
{
_lookupRateLimiter = lookupRateLimiter;
_lookupDispatcher = lookupDispatcher;
_exceptionFactory = exceptionFactory;
_timeout = timeout;
}
public MarketSummaryFacade(
MarketSummaryRequestFormatter marketSummaryRequestFormatter,
LookupDispatcher lookupDispatcher,
LookupRateLimiter lookupRateLimiter,
ExceptionFactory exceptionFactory,
TimeSpan timeout) : base(lookupDispatcher, lookupRateLimiter, exceptionFactory, timeout)
{
_marketSummaryRequestFormatter = marketSummaryRequestFormatter;
}
public ChainsFacade(
ChainsRequestFormatter chainsRequestFormatter,
ChainsMessageHandler chainsMessageHandler,
LookupDispatcher lookupDispatcher,
LookupRateLimiter lookupRateLimiter,
ExceptionFactory exceptionFactory,
TimeSpan timeout) : base(lookupDispatcher, lookupRateLimiter, exceptionFactory, timeout)
{
_chainsMessageHandler = chainsMessageHandler;
_chainsRequestFormatter = chainsRequestFormatter;
}
public void Should_Validate_RequestsPerSecond()
{
// Arrange
var requestsPerSecond = 50;
// Act
var lookupRateLimiter = new LookupRateLimiter(requestsPerSecond);
// Assert
Assert.AreEqual(lookupRateLimiter.RequestsPerSecond, requestsPerSecond);
}
public NewsFacade(
NewsRequestFormatter newsRequestFormatter,
LookupDispatcher lookupDispatcher,
LookupRateLimiter lookupRateLimiter,
ExceptionFactory exceptionFactory,
NewsMessageHandler newsMessageHandler,
TimeSpan timeout) : base(lookupDispatcher, lookupRateLimiter, exceptionFactory, timeout)
{
_newsMessageHandler = newsMessageHandler;
_newsRequestFormatter = newsRequestFormatter;
}
public void Should_Dispose()
{
// Arrange
var requestsPerSecond = 50;
var lookupRateLimiter = new LookupRateLimiter(requestsPerSecond);
// Act
lookupRateLimiter.Dispose();
// Assert
Assert.False(lookupRateLimiter.IsRunning);
}
public LookupMessageFileHandler(
LookupDispatcher lookupDispatcher,
LookupRateLimiter lookupRateLimiter,
ExceptionFactory exceptionFactory,
TimeSpan timeout)
{
_endOfMsgBytes = Encoding.ASCII.GetBytes(IQFeedDefault.ProtocolEndOfMessageCharacters + IQFeedDefault.ProtocolDelimiterCharacter + IQFeedDefault.ProtocolTerminatingCharacters);
_lookupDispatcher = lookupDispatcher;
_lookupRateLimiter = lookupRateLimiter;
_exceptionFactory = exceptionFactory;
_timeout = timeout;
}
public void Should_Validate_Interval()
{
// Arrange
var requestsPerSecond = 50;
// Act
var lookupRateLimiter = new LookupRateLimiter(requestsPerSecond);
// Assert
var expectedInterval = TimeSpan.FromMilliseconds(1000 / requestsPerSecond);
Assert.AreEqual(lookupRateLimiter.Interval, expectedInterval);
}
public HistoricalFacade(
HistoricalRequestFormatter historicalRequestFormatter,
LookupDispatcher lookupDispatcher,
LookupRateLimiter lookupRateLimiter,
ExceptionFactory exceptionFactory,
IHistoricalMessageHandler historicalMessageHandler,
HistoricalFileFacade historicalFileFacade,
TimeSpan timeout) : base(lookupDispatcher, lookupRateLimiter, exceptionFactory, timeout)
{
_historicalMessageHandler = historicalMessageHandler;
_historicalRequestFormatter = historicalRequestFormatter;
File = historicalFileFacade;
}
public void Should_Validate_MaxCount()
{
// Arrange
var requestsPerSecond = 50;
// Act
var lookupRateLimiter = new LookupRateLimiter(requestsPerSecond);
// Assert
var expectedMaxCount = 25;
Assert.AreEqual(lookupRateLimiter.MaxCount, expectedMaxCount);
}
public SymbolFacade(
SymbolRequestFormatter symbolRequestFormatter,
LookupDispatcher lookupDispatcher,
LookupRateLimiter lookupRateLimiter,
ExceptionFactory exceptionFactory,
SymbolMessageHandler symbolMessageHandler,
MarketSymbolReader marketSymbolReader,
ExpiredOptionReader expiredOptionReader,
FileDownloader fileDownloader,
TimeSpan timeout) : base(lookupDispatcher, lookupRateLimiter, exceptionFactory, timeout)
{
_symbolRequestFormatter = symbolRequestFormatter;
_symbolMessageHandler = symbolMessageHandler;
_expiredOptionReader = expiredOptionReader;
_marketSymbolReader = marketSymbolReader;
_fileDownloader = fileDownloader;
}
public async Task Should_Rate_Limit_By_Throughput()
{
// Arrange
var totalSeconds = TimeSpan.FromSeconds(15).TotalSeconds;
var seconds = 0;
var requestsPerSecond = 50;
var requestsCount = 0;
var requests = new List <int>();
var lookupRateLimiter = new LookupRateLimiter(requestsPerSecond);
var cts = new CancellationTokenSource();
// Act
_ = Task.Run(async() =>
{
while (true)
{
await lookupRateLimiter.WaitAsync();
Interlocked.Increment(ref requestsCount);
}
}, cts.Token);
while (seconds < totalSeconds)
{
var sw = Stopwatch.StartNew();
await Task.Delay(TimeSpan.FromSeconds(1));
sw.Stop();
Console.WriteLine($"requests: {requestsCount}/{sw.Elapsed.TotalMilliseconds}ms");
requests.Add(requestsCount);
Interlocked.Exchange(ref requestsCount, 0);
seconds++;
}
cts.Cancel();
cts.Dispose();
// Assert
Assert.That(requests.Average(), Is.EqualTo(requestsPerSecond).Within(2).Percent);
}
public async Task Should_Rate_Limit_By_Throughput()
{
// Arrange
var debug = false;
var totalSeconds = TimeSpan.FromSeconds(10).TotalSeconds;
var requestsPerSecond = 50;
var numberOfClients = 15;
var testResults = new List <TestResult>();
var lookupRateLimiter = new LookupRateLimiter(requestsPerSecond);
var cts = new CancellationTokenSource();
await Task.Delay(1000);
var tasks = new Task[numberOfClients];
var mutex = new object();
var requestsCount = 0;
var seconds = 0;
for (var i = 0; i < numberOfClients; i++)
{
var taskId = i;
tasks[i] = new Task(async() =>
{
while (true)
{
await lookupRateLimiter.WaitAsync().ConfigureAwait(false);
if (debug)
{
Console.WriteLine($"Executed task #{taskId}");
}
lock (mutex)
requestsCount++;
}
}, cts.Token);
}
// Act
for (var i = 0; i < numberOfClients; i++)
{
tasks[i].Start();
}
while (seconds < totalSeconds)
{
var sw = Stopwatch.StartNew();
await Task.Delay(TimeSpan.FromSeconds(1));
sw.Stop();
Console.WriteLine($"requests: {requestsCount}/{sw.Elapsed.TotalMilliseconds}ms");
lock (mutex)
{
testResults.Add(new TestResult(requestsCount, sw.Elapsed.TotalMilliseconds));
requestsCount = 0;
}
seconds++;
}
cts.Cancel();
cts.Dispose();
// Assert
// initial burst
var initialBurst = testResults.First();
var calcInitialBustRequestsPerSecond = initialBurst.NumberOfRequest * 1000 / initialBurst.TotalMilliseconds;
var expectedInitialBurst = lookupRateLimiter.RequestsPerSecond + lookupRateLimiter.MaxCount;
Assert.That(calcInitialBustRequestsPerSecond, Is.LessThan(expectedInitialBurst).Within(5).Percent);
Console.WriteLine($"Initial burst {calcInitialBustRequestsPerSecond} requests/second");
// average
var testResultsWithoutInitialBurst = testResults.Skip(1).ToList();
var totalMs = testResultsWithoutInitialBurst.Sum(x => x.TotalMilliseconds);
var totalRequests = testResultsWithoutInitialBurst.Sum(x => x.NumberOfRequest);
var calcRequestsPerSecond = totalRequests * 1000 / totalMs;
var variationPercentage = Math.Abs(calcRequestsPerSecond - requestsPerSecond) / requestsPerSecond * 100;
Console.WriteLine($"Average {calcRequestsPerSecond} requests/second");
Console.WriteLine($"Variation {variationPercentage} %");
Assert.That(calcRequestsPerSecond, Is.EqualTo(requestsPerSecond).Within(1).Percent);
}